x/tools/present: add timer and current time to notes/speaker window

[leighmcculloch]

What version of Go are you using (go version)?

$ go version
go version go1.12.4 linux/amd64

Does this issue reproduce with the latest release?

Yes

What operating system and processor architecture are you using (go env)?

go env Output

$ go env
GOARCH="amd64"
GOBIN="/home/leighmcculloch/local/bin"
GOCACHE="/home/leighmcculloch/.cache/go-build"
GOEXE=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOOS="linux"
GOPATH="/home/leighmcculloch/go"
GOPROXY=""
GORACE=""
GOROOT="/home/leighmcculloch/local/bin/go"
GOTMPDIR=""
GOTOOLDIR="/home/leighmcculloch/local/bin/go/pkg/tool/linux_amd64"
GCCGO="gccgo"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build861470077=/tmp/go-build -gno-record-gcc-switches"

What did you do?

Press N while viewing my go present talk slides, to open the notes window.

What did you expect to see?

The current time and a timer clearly showing how long I've been talking for (since the notes window is opened).

What did you see instead?

Not that.

Why would this be helpful?

The current time and how long we've been speaking for is something that almost all speakers need to be aware of. In some very well setup situations that information might be provided on stage, but in a lot of situations we're opening our phones and turning on stop watches and this never works well because our phone displays will sleep and it means looking at another display.

Other presentation tools, e.g. gitpitch, provide this, and it is extraordinarily helpful.

[ghost]

I would like to work on this if that is wanted. I think I found an efficient way to do it without much change.

Found a way to do it, but I will have to improve it a bit because it is a bit buggy in some browsers.
Sorry for the slow pace, having a lot on my plate.

[bcmills]

@ianthehat, does present have an owner?

[asahasrabuddhe]

Any update? I am looking for the same feature